<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script type="text/javascript" src="./js/vue.js"></script>
</head>

<body>
  <div id="app">
    <div id="app">
      <component-a></component-a>
      <component-b></component-b>
      <component-c></component-c>
    </div>
  </div>

  <script>
    new Vue({
      el: '#app',
      data: {
        selected: 'A',
        options: [
          { text: 'One', value: 'A' },
          { text: 'Two', value: 'B' },
          { text: 'Three', value: 'C' }
        ]
      }
    })

  </script>

</body>

</html>